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Support FORCE_COLOR env var (#10839)

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Fixes #5499 

## Summary

Add support for `FORCE_COLOR` env var, as specified at
https://force-color.org/

## Test Plan

I wrote an integration test for this, and then realized that can't work,
since we use a dev-dependency on `colored` with the `no-color` feature
to avoid ANSI color codes in test snapshots.

So this is just tested manually.

`cargo run --features test-rules -- check --no-cache --isolated -
--select RUF901 --diff < /dev/null` shows a colored diff.
`cargo run --features test-rules -- check --no-cache --isolated -
--select RUF901 --diff < /dev/null | less` does not have color, since we
pipe it to `less`.
`FORCE_COLOR=1 cargo run --features test-rules -- check --no-cache
--isolated - --select RUF901 --diff < /dev/null | less` does have color
(after this diff), even though we pipe it to `less`.
This commit is contained in:
Carl Meyer 2024-04-08 15:29:29 -06:00 • committed by GitHub
parent 3fd22973da
commit 42d52ebbec
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2 changed files with 10 additions and 2 deletions
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7
crates/ruff/src/lib.rs
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@ -149,6 +149,13 @@ pub fn run(
#[cfg(windows)]
assert!(colored::control::set_virtual_terminal(true).is_ok());
// support FORCE_COLOR env var
if let Some(force_color) = std::env::var_os("FORCE_COLOR") {
if force_color.len() > 0 {
colored::control::set_override(true);
}
}
set_up_logging(global_options.log_level())?;
if let Some(deprecated_alias_warning) = deprecated_alias_warning {